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High yield and mitigation of N-loss from paddy fields obtained by irrigation using optimized application of sewage tail water

文献类型： 外文期刊

作者： Yin, Aijing 1 ; Duan, Jingjing 1 ; Xue, Lihong 1 ; Feng, Yanfang 1 ; Petropoulos, Evangelos 4 ; Yang, Linzhang 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Key Lab Agroenvironm Downstream Yangtze Plain, Minist Agr & Rural Affairs, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

2.Nanjing Inst Environm Sci, Minist Ecol & Environm, Nanjing 210042, Peoples R China

3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China

4.Newcastle Univ, Sch Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

关键词： Domestic sewage; Tail water reclamation; Paddy soil; Fertilizer substitution; Effluent reuse

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN： 0167-8809

年卷期： 2020 年 304 卷

页码：

收录情况： SCI

摘要： Reuse of treated wastewater effluent for crop irrigation can be a promising strategy to substitute/reduce chemical fertilizers and mitigate contamination of water environment. The effect of the effluent irrigation strategies on crop yield and nitrogen (N) loss to the environment have not been yet well explored. In the present study, a soil column monitoring experiment was conducted for over two years (2016-2017) to assess the effect of domestic sewage tail water (DSTW) irrigation on rice growth and N-loss. DSTW irrigation was established substituting N fertilizer at percentages of 15 %, 30 % and 45 % (namely N3S1, N2S2 and N1S3) with a total nitrogen (TN) input of 210 kg.hm(-2); controls with conventional fertilizer (N210) and no fertilizer (N0) but tap water irrigation were also set up. A field plot experiment was also conducted using the same treatments in 2017. The results of the soil column experiment showed that the grain yield from treatments with different proportions of DSTW and N fertilizer were no lower than those subjected to conventional fertilizer in both years. The NH3 volatilization from the treatments using reclaimed DSTW accounted for 20.9 %-34.4 % TN in 2016, but this fell to 6.9 %-16.1 % in 2017. Compared with N210, the DSTW irrigation treatment (N1S3) significantly reduced NH3 emissions by 32.8 %-61.3 % over the two years (p < 0.05). The field plot experiment also indicated that DSTW reclamation could not significantly affect the rice growth and yield, and treatments with a higher proportion of N substituting by DSTW tended to have lower NH3 volatilization. With respect to the rice yield and N-loss, the recommended ratio of N fertilizer substitution is 30 %-45 %; however, long-term trials would be required to further evaluate of any adverse environmental impacts.

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